Abstract: In order to eliminate the shift-hunting, busy-shift and skidding occurred in the conventional automatic transmission, a multi-pattern automatic shift system based on driving environment recognition is proposed. This system can infer the current driving environment according to the signals deriving from the conventional automatic transmission sensors and select the proper shift strategy correspondingly. Thus, the problems when the vehicle travels in the specific driving situations can be solved and the vehicle’s driving performance can be improved effectively. This control method based on driving environment recognition will be the developing trend of future automobile control system.

Key words: Automatic transmission Shift strategy, Driving environment